Question

has a mechanical advantage always more than 1.

• A. Class I lever
• B. Class II lever
• C. Class III lever
• D. All levers

Answer 1

The correct option is B Class II lever

In $ClassIIlevers$, the fulcrum and the effort are at the two ends of the lever and the Load is somewhere in between the effort and the fulcrum.

MA of a lever $=\frac{Effortarm}{Loadarm}$

Since, the effort arm is always longer than the load arm .

From the equation above, it is clear that MA of the $ClassIIlevers$ is always greater than 1.